Question 657841: how many ways can a student select 2 electives from a possible choice of 10 electives?
Answer by pv=nrt15rcks(23)   (Show Source):
You can put this solution on YOUR website! You take the possible number of choices, in this case 10, and you multiply it by the number of places, in this case,2, subtracting 1 from the possible number of choices each time. So, your set up would look like 10*9 to get the answer of 90.
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